Blue Doctor Butterfly vs Red-footed Robber Fly
Side-by-side species comparison
| Attribute | Blue Doctor Butterfly | Red-footed Robber Fly |
|---|---|---|
| Scientific Name | Rhetus periander | Dioctria rufipes |
| Order | Lepidoptera | Diptera |
| Family | Riodinidae | Asilidae |
| Size | 55-65 mm wingspan | 9-13 mm |
| Habitat | Rivers & Streams | Woodlands |
| Diet | Herbivores | Herbivores |
| Regions | South America (Brazil, Peru, Colombia, Ecuador, Venezuela, Bolivia) | Europe, Western Asia |
| Conservation | Least Concern | Least Concern |
Blue Doctor Butterfly
A large metalmark butterfly with brilliant metallic blue upperwings and distinctive red-spotted underwings with long tail streamers. It is one of the largest and most spectacular members of the family Riodinidae. Males are territorial and frequently seen perching on sunlit leaves.
Did You Know?
Despite being a metalmark butterfly rather than a swallowtail, it has evolved long tail streamers on its hindwings through convergent evolution.
Red-footed Robber Fly
A slender, metallic-dark robber fly with conspicuous orange-red legs found in European woodlands. It specializes in ambushing small flies and midges from sunlit perches on leaves.
Did You Know?
It is one of the earliest robber flies to appear each year, often active from late spring when most other asilids are still developing.